Here's a radically different thought...Costco offers a pair of wrap around DVD players that have been very good. They're designed to be semi-permanent - you can easily & quickly attach them to the front seat back. They can be direct powered or run off built in batteries. We put them in the trunk when not in use, but you'd be amazed how many times the kids bring them into the house when they aren't finished with the movie ~ but we've arrived at our destination! They were amazingly inexpensive and have been bullet proof for a lot of hours so far.